Effect of two-step cooling process on mechanical properties of TRIP steel with high performance

M.L. Li, ? H. Jiang, ? Y.L. He, ? L.B. Chen, ? G.T. Zhang ? H. Wang ? X.G. Lu, ? L. Li,

Journal of Iron and Steel Research International ›› 2018, Vol. 25 ›› Issue (4) : 426-432.

PDF(8172 KB)
Welcome to visit Journal of Iron and Steel Research International, July 30, 2025
PDF(8172 KB)
Journal of Iron and Steel Research International ›› 2018, Vol. 25 ›› Issue (4) : 426-432.

Effect of two-step cooling process on mechanical properties of TRIP steel with high performance

Author information +
History +

Abstract

A novel two-step cooling experiment was established to simulate the slow cooling process of continuous annealing production line for transformation-induced plasticity (TRIP) steel. The microstructures and mechanical properties of TRIP steel soaked at 700 °C for different time were investigated by tensile test, scanning electron microscopy, X-ray diffraction, and thermodynamic and kinetic calculation. It is shown that the steel soaked for 15 s exhibits the optimal product of strength and elongation (PSE > 30,000 MPa%) due to the transformation of austenite to proeutectoid ferrite, which delays the bainite transformation and improves the stability of retained austenite. In addition, the mechanical properties of TRIP steel soaked over 30 s are much lower, resulting from the precipitation of cementite, which decreases the stability of retained austenite and weakens the TRIP effect.

Key words

TRIP steel / two-steps cooling process / microstructure / mechanical properties

Cite this article

Download Citations
CHEN Li-Ben, HU -JIANG, YAN-LIN -HE, et al. Effect of two-step cooling process on mechanical properties of TRIP steel with high performance[J]. Journal of Iron and Steel Research International, 2018, 25(4): 426-432

References

[1]Zackay V F, Parker E R, Fahr D, et al.The enhancement of ductility in high-strength steels[J].ASM Trans Quart, 1967, 60(2):252-259
[2]Yin H, Zhao Z, Zhao A, et al.Effect of Annealing Process on Microstructure and Mechanical Property of 1100 MPa Grade TRIP Steel[J].Journal of Iron and Steel Research, International, 2015, 22(7):622-629
[3]Xu Y, Hou X, Wang Y, et al.Effects of rapid heating continuous annealing on microstructure and mechanical properties of ultra high-strength trip-aided steel[J].Acta Metallurgica Sinica(China), 2012, 48(2):176-182
[4]辜蕾钢, 徐文章.冷轧带钢连续退火冷却技术及建设的连续退火机组[J].钢铁技术, 2007, 5:13-17
[5]康永林,邝霜,刘仁东,严玲. 汽车用冷轧双相钢的生产工艺及组织性能特征[J]. 鞍钢技术,2008,(04):1-8+34.
Dyson D J, Holmes B. Effect of alloying additions on the lattice parameter of austenite[J]. J Iron Steel Inst, 1970, 208(5): 469-474.
Kirkaldy J S. Prediction of alloy hardenability from thermodynamic and kinetic data[J]. Metallurgical Transactions, 1973, 4(10): 2327-2333.
Saunders N, Guo Z, Li X, et al. The calculation of TTT and CCT diagrams for general steels[J]. JMatPro Software Literature, 2004.
[9] Standard A. E112: Standard Test Methods for Determining Average Grain Size, West Conshocken, 1996.
[10] Sente Software Ltd. (EB|OL). (2017) http://www.sentesoftware.co.uk/downloads/articles-and-papers.aspx
ZHU L, Di W, ZHAO X. Modeling of Austenite Decomposition in Low Si-Mn TRIP Steel During Cooling[J]. Journal of iron and steel research, international, 2008, 15(6): 68-71.
Zhang S, Findley K O. Quantitative assessment of the effects of microstructure on the stability of retained austenite in TRIP steels[J]. Acta Materialia, 2013, 61(6): 1895-1903.
彭继波, 陈立本, 姜沪, 等. 合金成分对 1000 MPa 级 TRIP 钢组织和力学性能的影响[J]. 材料热处理学报, 2016, 1.
Chiang J, Lawrence B, Boyd J D, et al. Effect of microstructure on retained austenite stability and work hardening of TRIP steels[J]. Materials Science and Engineering: A, 2011, 528(13): 4516-4521.
Sugimoto K, Usui N, Kobayashi M, et al. Effects of Volume Fraction and Stability of Retained Austenite on Ductility of TRIP-aided Dual-phase Steels[J]. ISIJ international, 1992, 32(12): 1311-1318.
Cai Z H, Ding H, Misra R D K, et al. Austenite stability and deformation behavior in a cold-rolled transformation-induced plasticity steel with medium manganese content[J]. Acta Materialia, 2015, 84: 229-236.
Lee S, Lee S J, De Cooman B C. Work hardening behavior of ultrafine-grained Mn transformation-induced plasticity steel[J]. Acta Materialia, 2011, 59(20): 7546-7553.

Funding

Shanghai Municipal Natural Science Foundation;Shanghai Municipal Science and Technology Commission
PDF(8172 KB)

Accesses

Citation

Detail

Sections
Recommended

/